A relatively thin metallic item, having a concave or cupped contour, designed to effect its own seal by compression against the circumference of a hole. It is used as a blowout plug in boilers, engines, and the like to relieve the pressure created by the expansion of fluids caused by heat or freezing.
Classification: Parts for steam or other vapor generating boilers and super-heated water boilers, except heat exchangers
NSN 6220-01-061-3114
NSN 6620-01-530-0213
NSN 5998-01-255-3195
NSN 5855-01-023-3727
NSN 5990-00-461-5372
NSN 5996-01-141-6916
NSN 6150-01-354-9437
NSN 5998-01-144-5568
NSN 5996-01-047-4518
NSN 5930-01-236-6522
NSN 5945-01-077-9772
NSN 5925-01-095-9990